<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
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        integrity="sha384-HSMxcRTRxnN+Bdg0JdbxYKrThecOKuH5zCYotlSAcp1+c8xmyTe9GYg1l9a69psu" crossorigin="anonymous">

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        integrity="sha384-6pzBo3FDv/PJ8r2KRkGHifhEocL+1X2rVCTTkUfGk7/0pbek5mMa1upzvWbrUbOZ" crossorigin="anonymous">
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        crossorigin="anonymous"></script>
    <title>Document</title>
</head>

<body>
    <div class='container'>
        <!-- Button trigger modal -->
        <!-- <button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
            Launch demo modal
        </button>

         Modal -->
        <!--<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
            <div class="modal-dialog" role="document">
                <div class="modal-content">
                    <div class="modal-header">
                        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span
                                aria-hidden="true">&times;</span></button>
                        <h4 class="modal-title" id="myModalLabel">Modal title</h4>
                    </div>
                    <div class="modal-body">
                        ...
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
                        <button type="button" class="btn btn-primary">Save changes</button>
                    </div>
                </div>
            </div>
        </div> -->

          <!-- Button trigger modal -->
<button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
    Launch demo modal
  </button>
  
  <!-- Modal -->
  <div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
    <div class="modal-dialog" role="document">
      <div class="modal-content">
        <div class="modal-header">
          <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
          <h4 class="modal-title" id="myModalLabel">Modal title</h4>
        </div>
        <div class="modal-body">
          ...
        </div>
        <div class="modal-footer">
          <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
          <button type="button" class="btn btn-primary">Save changes</button>
        </div>
      </div>
    </div>
  </div>

            <!-- Large modal -->
            <button type="button" class="btn btn-success" data-toggle="modal" data-target=".bs-example-modal-lg">Large
                modal</button>

            <div class="modal fade bs-example-modal-lg" tabindex="-1" role="dialog" aria-labelledby="myLargeModalLabel">
                <div class="modal-dialog modal-lg" role="document">
                    <div class="modal-content">
                        <div class="modal-header">
                          <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
                          <h4 class="modal-title" id="myModalLabel">Modal title</h4>
                        </div>
                        <div class="modal-body">
                          ...
                        </div>
                        <div class="modal-footer">
                          <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
                          <button type="button" class="btn btn-primary">Save changes</button>
                        </div>
                      </div>
                </div>
            </div>

            <!-- Small modal -->
            <button type="button" class="btn btn-success" data-toggle="modal" data-target=".bs-example-modal-sm">Small
                modal</button>

            <div class="modal fade bs-example-modal-sm" tabindex="-1" role="dialog" aria-labelledby="mySmallModalLabel">
                <div class="modal-dialog modal-sm" role="document">
                    <div class="modal-content">
                        小框框
                    </div>
                </div>
            </div>
    </div>

</body>

</html>